US3396083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preferential production of cephalosporin c, penicillin n, or cephalosporin p
Assignee: National Research Development Corp UK
•
Filing: 1965-04-07
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Granted: 1968-08-06
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Expires: 1985-04-07
Abstract
No abstract record available.
Inventors
- 👤 Callow Donald Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:46
CPC Classifications
C; C12; C12P; C12P35/00; C12P35/06; Y; Y10; Y10S; Y10S435/00; Y10S435/813; Y10S435/8215; Y10S435/911; Y10S435/925
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |